512991797 has 2 divisors, whose sum is σ = 512991798. Its totient is φ = 512991796.

The previous prime is 512991767. The next prime is 512991803. The reversal of 512991797 is 797199215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365344996 + 147646801 = 19114^2 + 12151^2 .

It is a cyclic number.

It is not a de Polignac number, because 512991797 - 2⁶ = 512991733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512991707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256495898 + 256495899.

It is an arithmetic number, because the mean of its divisors is an integer number (256495899).

Almost surely, 2^512991797 is an apocalyptic number.

It is an amenable number.

512991797 is a deficient number, since it is larger than the sum of its proper divisors (1).

512991797 is an equidigital number, since it uses as much as digits as its factorization.

512991797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 50.

The square root of 512991797 is about 22649.3222194396. The cubic root of 512991797 is about 800.5162277520.

The spelling of 512991797 in words is "five hundred twelve million, nine hundred ninety-one thousand, seven hundred ninety-seven".